package com.sky.service.impl;

import com.github.xiaoymin.knife4j.core.util.StrUtil;
import com.google.common.collect.Lists;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper  orderMapper;
    @Autowired
    private UserMapper  userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    @Override
    public TurnoverReportVO getturnoverStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList();
        for(LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double  tu = orderMapper.sumByMap(map);
            tu = tu == null ?  0.0 : tu;
            turnoverList.add(tu);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();



    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();

            map.put("end",endTime);
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
       List<Integer> orderCountList = new ArrayList<>();
       List<Integer> validOrderCountList = new ArrayList<>();
        for(LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);

        }
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer  validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();


        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 销量前十商品
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getTop10Statistics(LocalDate begin, LocalDate end) {

        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO>  salesTop10 =orderMapper.getSalesTop10(begin,end);

        List<String> names=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        List<Integer> numbers=salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }



    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }

    /**
     * 导出营业数据
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) throws IOException {

        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate  end = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream in = this.getClass().getResourceAsStream("/template/运营数据报表模板.xlsx");
        XSSFWorkbook excle = new XSSFWorkbook(in);

        XSSFSheet sheet = excle.getSheet("Sheet1");
        sheet.getRow(1).getCell(1).setCellValue("时间"+begin+"至"+end);
        sheet.getRow(3).getCell(2).setCellValue(businessDataVO.getTurnover());
        sheet.getRow(3).getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
        sheet.getRow(3).getCell(6).setCellValue(businessDataVO.getNewUsers());

        XSSFRow row = sheet.getRow(4);
        row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
        row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

        for (int i = 0; i < 30; i++){
            LocalDate date = begin.plusDays(i);
            BusinessDataVO businessDataVO1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

            row =sheet.getRow(7+i);

            row.getCell(1).setCellValue(date.toString());
            row.getCell(2).setCellValue(businessDataVO1.getTurnover());
            row.getCell(3).setCellValue(businessDataVO1.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO1.getOrderCompletionRate());
            row.getCell(5).setCellValue(businessDataVO1.getUnitPrice());
            row.getCell(6).setCellValue(businessDataVO1.getNewUsers());
        }

        ServletOutputStream  out = response.getOutputStream();

        excle.write(out);

        excle.close();
        out.close();
    }
}
